Giannias, Dimitrious, Yuri Chepurko, Alessandro Figus, and Nguyá»…n Hoàng Hiển. 2017. “Measuring Regional Inequalities by Amenity Productivity Approach for Sustainable Economic and Environmental Policies in EU”. International Journal of Energy Economics and Policy 7 (4):107-14. https://econjournals.com/index.php/ijeep/article/view/5387.